1 /* 2 * Copyright (c) 2006-2018, RT-Thread Development Team 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 * 6 * Change Logs: 7 * Date Author Notes 8 * 2015-02-17 Bernard First version 9 */ 10 11 #ifndef IN_H__ 12 #define IN_H__ 13 14 #include <sys/socket.h> 15 16 #ifndef IN6_IS_ADDR_MULTICAST 17 #define IN6_IS_ADDR_MULTICAST(a) (((uint8_t *) (a))[0] == 0xff) 18 #endif 19 20 #endif 21